Blue Ivy is her daddy's biggest fan, says Jay Z

• Baby Blue loves both her parents%27 music%2C daddy%27s especially
• Jay Z says it gives him joy she likes his new album so much

Only 18 months old and Blue Ivy Carter is already a discerning tot music-wise, says her proud papa, Jay Z, who dominates the cover of Vanity Fair this month.

"She's my biggest fan," he says in the story inside the November issue. Even if no one else bought his new album, Magna Carta, "the fact that she loves it so much, it gives me the greatest joy.

"And that's not like a cliché. I'm really serious. Just to see her — 'Daddy song, more, Daddy.' She's genuine, she's honest, because she doesn't know it makes me happy. She just wants to hear it."

How cute is that?

It may be the most either Jay (Shawn Carter) or mom Beyoncé have said recently about their daughter in an interview, but writer Lisa Robinson is famous for getting touchy rock stars to open up about stuff they'd rather not talk about. And Blue, as Jay calls her, is clearly his favorite topic.

Jay, 43, says Beyoncé thinks Blue prefers daddy's music over hers, but he says it's just a question of who has the newest album playing around the house.

"She watches (Beyoncé's concerts) on the computer every night," he says. "But my album came out and I don't know if Blue ever heard any of my music prior to this album...But this album was new, so we played it. And she loves all the songs."

And by the way, the reason they trademarked their daughter's name was to prevent others from exploiting it for profit, which people do nowadays. "It wasn't for us to do anything; as you see, we haven't done anything."

The interview is wide ranging. He talks about his friend President Obama's re-election ("It renewed my spirit for America"), about how he never would have believed a black man could be elected president ("If you had told me that as a kid, I'd be like, Are you out of your mind? How?"); about what his past as a drug dealer taught him ("I know about budgets."), and that he later regretted selling crack cocaine because of its effect on his community ("In the beginning, no. I was thinking about surviving. I was thinking about improving my situation. I was thinking about buying clothes.")

Jay is not unaware of his charms. Does he think Beyoncé would have gone out with him if he had been, say, a gas-station attendant? "If I'm as cool as I am, yes," he says. "But she's a charming Southern girl, you know, she's not impressed. . . . But I would have definitely had to be this cool."

But even cool celebs get their feelings hurt, as when rumors swirled that Beyoncé wasn't really pregnant with their first child. Jay called the story spread on the Internet "so stupid."

"I felt dismissive about it, but you've got to feel for her," he says. "We've got a really charmed life, so how can we complain? But when you think about it, we're still human beings. . . . And even in hip-hop, all the blogs — they had a field day with it. I'm like, We come from you guys, we represent you guys. Why are you perpetuating this? Why are you adding fuel to this ridiculous rumor?"

The November issue will be on national newsstands on Oct. 9.